存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)的(de)工作(zuo)原理存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)的(de)工作(zuo)原理可以分(fen)為(wei)讀(du)(du)(du)取(qu)(qu)(qu)數(shu)據(ju)(ju)(ju)和寫入(ru)(ru)數(shu)據(ju)(ju)(ju)兩個(ge)過(guo)程(cheng)(cheng)。1.讀(du)(du)(du)取(qu)(qu)(qu)數(shu)據(ju)(ju)(ju)在(zai)進(jin)行讀(du)(du)(du)取(qu)(qu)(qu)數(shu)據(ju)(ju)(ju)時，首(shou)先需(xu)要(yao)(yao)將要(yao)(yao)讀(du)(du)(du)取(qu)(qu)(qu)的(de)地(di)(di)址(zhi)信(xin)(xin)(xin)(xin)息(xi)(xi)通過(guo)地(di)(di)址(zhi)總(zong)線發(fa)送給(gei)存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)。存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)接收到地(di)(di)址(zhi)信(xin)(xin)(xin)(xin)息(xi)(xi)后(hou)，會將對應的(de)數(shu)據(ju)(ju)(ju)通過(guo)數(shu)據(ju)(ju)(ju)總(zong)線返回(hui)給(gei)CPU。在(zai)這(zhe)個(ge)過(guo)程(cheng)(cheng)中(zhong)，需(xu)要(yao)(yao)發(fa)送一些控(kong)(kong)制(zhi)信(xin)(xin)(xin)(xin)號，用于(yu)控(kong)(kong)制(zhi)存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)的(de)讀(du)(du)(du)取(qu)(qu)(qu)操作(zuo)。2.寫入(ru)(ru)數(shu)據(ju)(ju)(ju)在(zai)進(jin)行寫入(ru)(ru)數(shu)據(ju)(ju)(ju)時，首(shou)先需(xu)要(yao)(yao)將要(yao)(yao)寫入(ru)(ru)的(de)地(di)(di)址(zhi)信(xin)(xin)(xin)(xin)息(xi)(xi)和數(shu)據(ju)(ju)(ju)信(xin)(xin)(xin)(xin)息(xi)(xi)通過(guo)地(di)(di)址(zhi)總(zong)線和數(shu)據(ju)(ju)(ju)總(zong)線發(fa)送給(gei)存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)。存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)接收到地(di)(di)址(zhi)信(xin)(xin)(xin)(xin)息(xi)(xi)和數(shu)據(ju)(ju)(ju)信(xin)(xin)(xin)(xin)息(xi)(xi)后(hou)，會將數(shu)據(ju)(ju)(ju)寫入(ru)(ru)到對應的(de)存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)單元中(zhong)。在(zai)這(zhe)個(ge)過(guo)程(cheng)(cheng)中(zhong)，需(xu)要(yao)(yao)發(fa)送一些控(kong)(kong)制(zhi)信(xin)(xin)(xin)(xin)號，用于(yu)控(kong)(kong)制(zhi)存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)的(de)寫入(ru)(ru)操作(zuo)。存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)的(de)相關(guan)發(fa)展有(you)哪(na)些進(jin)程(cheng)(cheng)？天津24AA02E64-I/SN存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)可編程(cheng)(cheng)

常用存(cun)(cun)(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)，你知(zhi)道有(you)哪些嗎？存(cun)(cun)(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)按存(cun)(cun)(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)介(jie)質特(te)性(xing)(xing)(xing)來說(shuo)，可以(yi)分為(wei)(wei)(wei)兩類(lei)，一(yi)(yi)類(lei)就(jiu)是易(yi)失(shi)性(xing)(xing)(xing)存(cun)(cun)(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)，一(yi)(yi)類(lei)是非易(yi)失(shi)性(xing)(xing)(xing)存(cun)(cun)(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)。從計算機(ji)角(jiao)度上看，易(yi)失(shi)性(xing)(xing)(xing)存(cun)(cun)(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)可以(yi)理解為(wei)(wei)(wei)內存(cun)(cun)(cun)(cun)(cun)，而(er)非易(yi)性(xing)(xing)(xing)存(cun)(cun)(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)可以(yi)理解為(wei)(wei)(wei)硬盤。易(yi)失(shi)性(xing)(xing)(xing)存(cun)(cun)(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)特(te)點：掉電丟(diu)失(shi)數據(ju)(ju)，但存(cun)(cun)(cun)(cun)(cun)取數據(ju)(ju)速度很快。而(er)非易(yi)性(xing)(xing)(xing)存(cun)(cun)(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)比(bi)較大的(de)(de)(de)特(te)性(xing)(xing)(xing)：掉電不丟(diu)失(shi)數據(ju)(ju)，可用于(yu)長期存(cun)(cun)(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)數據(ju)(ju)。易(yi)失(shi)性(xing)(xing)(xing)存(cun)(cun)(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)易(yi)失(shi)性(xing)(xing)(xing)存(cun)(cun)(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)就(jiu)是RAM，即(ji)隨機(ji)存(cun)(cun)(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)。RAM通常作為(wei)(wei)(wei)操作系統(tong)或者系統(tong)正在運行中的(de)(de)(de)程序的(de)(de)(de)臨時數據(ju)(ju)存(cun)(cun)(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)介(jie)質。按照存(cun)(cun)(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)結(jie)構(gou)，RAM又分為(wei)(wei)(wei)兩種(zhong)，一(yi)(yi)種(zhong)為(wei)(wei)(wei)DRAM(DynamicRAM)即(ji)動態隨機(ji)存(cun)(cun)(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)，另一(yi)(yi)種(zhong)為(wei)(wei)(wei)SRAM(StaticRAM)即(ji)靜態隨機(ji)存(cun)(cun)(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)。遼寧24AA02E48-I/SN存(cun)(cun)(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)進口原(yuan)裝傳(chuan)統(tong)的(de)(de)(de)存(cun)(cun)(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)還(huan)具有(you)光盤等(deng)相關存(cun)(cun)(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)記(ji)憶(yi)的(de)(de)(de)原(yuan)件。

外(wai)部(bu)大(da)容量(liang)存(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)外(wai)部(bu)大(da)容量(liang)存(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)就有磁盤(pan)(pan)(pan)存(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(硬(ying)盤(pan)(pan)(pan)和(he)(he)軟盤(pan)(pan)(pan))、光盤(pan)(pan)(pan)存(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)和(he)(he)SD卡。磁盤(pan)(pan)(pan)存(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)，容量(liang)大(da)，使用(yong)(yong)(yong)壽命長(chang)但價格貴，主要是用(yong)(yong)(yong)在個人PC中，較少(shao)用(yong)(yong)(yong)在嵌入式開發中。光盤(pan)(pan)(pan)存(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)：用(yong)(yong)(yong)光學方式讀取/寫入信息的(de)圓盤(pan)(pan)(pan)，一般用(yong)(yong)(yong)于(yu)多(duo)媒體(ti)信息載體(ti)，較少(shao)出現在嵌入式領域(yu)中。SD卡：體(ti)積小，安全性也高。簡(jian)單設(she)計一下外(wai)圍電路即(ji)可支(zhi)持嵌入式開發，是常見的(de)外(wai)部(bu)存(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)。存(cun)(cun)儲(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)類型內存(cun)(cun)儲(chu)(chu)(chu)(chu):eRAM，這東(dong)西很特殊，很少(shao)見，速(su)度極快(kuai)，現在已知(zhi)的(de)是用(yong)(yong)(yong)于(yu)XBOX360的(de)GPU，其中的(de)eRAM帶(dai)寬(kuan)256GB/s。SRAM，速(su)度很快(kuai)，發熱量(liang)大(da)，單位容量(liang)價格高，用(yong)(yong)(yong)于(yu)CPU的(de)緩存(cun)(cun)，其中一級緩存(cun)(cun)帶(dai)寬(kuan)大(da)約30-50GB/s。DRAM，主要用(yong)(yong)(yong)于(yu)內存(cun)(cun)顆粒(li)。

段(duan)模(mo)(mo)式(shi)存(cun)儲在這種(zhong)管理模(mo)(mo)型下，對程序(xu)(xu)來說存(cun)儲器由一組(zu)一個(ge)(ge)單(dan)獨的(de)(de)的(de)(de)地(di)址(zhi)空(kong)間組(zu)成，這個(ge)(ge)地(di)址(zhi)空(kong)間稱之為段(duan)代碼數據(ju)堆(dui)棧位(wei)于分開的(de)(de)段(duan)中(zhong)，程序(xu)(xu)利用邏輯(ji)地(di)址(zhi)殉(xun)職(zhi)段(duan)中(zhong)的(de)(de)每(mei)個(ge)(ge)字節單(dan)元，每(mei)個(ge)(ge)段(duan)都(dou)能(neng)達(da)到4GB在處理器內部，所有(you)的(de)(de)段(duan)都(dou)被映射出線性空(kong)間地(di)址(zhi)，程序(xu)(xu)訪問一個(ge)(ge)存(cun)儲單(dan)元時，處理器會將邏輯(ji)地(di)址(zhi)轉化(hua)成線性地(di)址(zhi)使用這種(zhong)存(cun)儲模(mo)(mo)式(shi)主要是增加(jia)程序(xu)(xu)的(de)(de)可靠(kao)性，例(li)如，將堆(dui)棧安排在分開的(de)(de)段(duan)中(zhong)，可以防止堆(dui)棧區域增加(jia)時侵占代碼或數據(ju)空(kong)間，段(duan)存(cun)儲可以提高計算(suan)機(ji)的(de)(de)預算(suan)效率。

存儲器(qi)的存放需要注(zhu)意什么？

主(zhu)要采(cai)用三級層(ceng)次結構(gou)來(lai)構(gou)成存(cun)(cun)(cun)(cun)(cun)(cun)儲(chu)系(xi)統(tong)，由(you)高(gao)(gao)速緩沖存(cun)(cun)(cun)(cun)(cun)(cun)儲(chu)器(qi)(qi)(qi)Cache、主(zhu)存(cun)(cun)(cun)(cun)(cun)(cun)儲(chu)器(qi)(qi)(qi)和(he)(he)輔(fu)助存(cun)(cun)(cun)(cun)(cun)(cun)儲(chu)器(qi)(qi)(qi)組成。圖中自(zi)上(shang)向下容量逐漸增大(da)，速度逐級降(jiang)低(di)，成本則逐次減(jian)少。整(zheng)(zheng)個結構(gou)可看(kan)成主(zhu)存(cun)(cun)(cun)(cun)(cun)(cun)一輔(fu)存(cun)(cun)(cun)(cun)(cun)(cun)和(he)(he)Cache-主(zhu)存(cun)(cun)(cun)(cun)(cun)(cun)兩個層(ceng)次。在輔(fu)助硬件和(he)(he)計算(suan)機操作(zuo)系(xi)統(tong)的(de)管理下，可把主(zhu)存(cun)(cun)(cun)(cun)(cun)(cun)一輔(fu)存(cun)(cun)(cun)(cun)(cun)(cun)作(zuo)為一個存(cun)(cun)(cun)(cun)(cun)(cun)儲(chu)整(zheng)(zheng)體，形(xing)成的(de)可尋址存(cun)(cun)(cun)(cun)(cun)(cun)儲(chu)空(kong)間(jian)(jian)(jian)比主(zhu)存(cun)(cun)(cun)(cun)(cun)(cun)儲(chu)器(qi)(qi)(qi)空(kong)間(jian)(jian)(jian)大(da)得多。由(you)于輔(fu)存(cun)(cun)(cun)(cun)(cun)(cun)容量大(da)，價(jia)(jia)格(ge)低(di)，使得存(cun)(cun)(cun)(cun)(cun)(cun)儲(chu)系(xi)統(tong)的(de)整(zheng)(zheng)體平均價(jia)(jia)格(ge)降(jiang)低(di)。Cache-主(zhu)存(cun)(cun)(cun)(cun)(cun)(cun)層(ceng)次可以縮小主(zhu)存(cun)(cun)(cun)(cun)(cun)(cun)和(he)(he)CPU之(zhi)間(jian)(jian)(jian)的(de)速度差距，從整(zheng)(zheng)體上(shang)提高(gao)(gao)存(cun)(cun)(cun)(cun)(cun)(cun)儲(chu)器(qi)(qi)(qi)系(xi)統(tong)的(de)存(cun)(cun)(cun)(cun)(cun)(cun)取速度。為什么許多客戶會(hui)選(xuan)擇我們的(de)存(cun)(cun)(cun)(cun)(cun)(cun)儲(chu)器(qi)(qi)(qi)產品？安徽24AA02E48T-I/SN存(cun)(cun)(cun)(cun)(cun)(cun)儲(chu)器(qi)(qi)(qi)可擦除

存儲器可以在大型機器上使用。天津24AA02E64-I/SN存儲器可編程

存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)是(shi)(shi)(shi)(shi)計算機(ji)(ji)中(zhong)非常重要的(de)組成部分，它(ta)用(yong)于存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)(chu)(chu)計算機(ji)(ji)程(cheng)序和數據(ju)(ju)。存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)的(de)工作(zuo)原理是(shi)(shi)(shi)(shi)什(shen)么？本文(wen)將從存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)的(de)分類、存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)的(de)組成、存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)的(de)讀寫(xie)(xie)操(cao)作(zuo)等方面進行詳細介紹(shao)。一(yi)(yi)(yi)、存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)的(de)分類存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)可(ke)(ke)以(yi)分為隨(sui)(sui)機(ji)(ji)存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)（RAM）和只(zhi)(zhi)讀存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)（ROM）兩種(zhong)。其中(zhong)，RAM是(shi)(shi)(shi)(shi)一(yi)(yi)(yi)種(zhong)易失(shi)性存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)，它(ta)的(de)數據(ju)(ju)在(zai)斷(duan)電(dian)(dian)后(hou)會丟(diu)(diu)失(shi)；而ROM是(shi)(shi)(shi)(shi)一(yi)(yi)(yi)種(zhong)非易失(shi)性存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)，它(ta)的(de)數據(ju)(ju)在(zai)斷(duan)電(dian)(dian)后(hou)不(bu)會丟(diu)(diu)失(shi)。RAM又可(ke)(ke)以(yi)分為靜態隨(sui)(sui)機(ji)(ji)存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)（SRAM）和動態隨(sui)(sui)機(ji)(ji)存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)（DRAM）兩種(zhong)。SRAM是(shi)(shi)(shi)(shi)一(yi)(yi)(yi)種(zhong)速(su)(su)度(du)較(jiao)快、功耗較(jiao)高的(de)存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)，它(ta)的(de)存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)(chu)(chu)單元(yuan)由6個晶體管(guan)組成，可(ke)(ke)以(yi)實現快速(su)(su)的(de)讀寫(xie)(xie)操(cao)作(zuo)；而DRAM是(shi)(shi)(shi)(shi)一(yi)(yi)(yi)種(zhong)速(su)(su)度(du)較(jiao)慢、功耗較(jiao)低的(de)存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)，它(ta)的(de)存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)(chu)(chu)單元(yuan)由一(yi)(yi)(yi)個晶體管(guan)和一(yi)(yi)(yi)個電(dian)(dian)容組成，需要定期(qi)刷新以(yi)保持數據(ju)(ju)的(de)正確性。ROM又可(ke)(ke)以(yi)分為只(zhi)(zhi)讀存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)（ROM）、可(ke)(ke)編(bian)程(cheng)只(zhi)(zhi)讀存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)（PROM）、可(ke)(ke)擦寫(xie)(xie)可(ke)(ke)編(bian)程(cheng)只(zhi)(zhi)讀存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)（EPROM）和閃存(cun)(cun)(cun)存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)（Flash）四種(zhong)。其中(zhong)，ROM是(shi)(shi)(shi)(shi)一(yi)(yi)(yi)種(zhong)只(zhi)(zhi)能讀取不(bu)能寫(xie)(xie)入的(de)存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)；PROM是(shi)(shi)(shi)(shi)一(yi)(yi)(yi)種(zhong)可(ke)(ke)以(yi)編(bian)程(cheng)一(yi)(yi)(yi)次的(de)存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)，編(bian)程(cheng)后(hou)不(bu)能修改；EPROM是(shi)(shi)(shi)(shi)一(yi)(yi)(yi)種(zhong)可(ke)(ke)以(yi)擦寫(xie)(xie)的(de)存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)，需要使用(yong)紫外(wai)線擦除器(qi)(qi)(qi)(qi)(qi)擦除后(hou)才(cai)能重新編(bian)程(cheng)；Flash是(shi)(shi)(shi)(shi)一(yi)(yi)(yi)種(zhong)可(ke)(ke)以(yi)擦寫(xie)(xie)的(de)存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)，可(ke)(ke)以(yi)通過(guo)電(dian)(dian)子擦除的(de)方式擦除數據(ju)(ju)。天(tian)津24AA02E64-I/SN存(cun)(cun)(cun)儲(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)(qi)可(ke)(ke)編(bian)程(cheng)

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